Impact of silica nanoparticles incorporation on the properties of resin infiltration: an in vitro study.

Background: This study evaluated the effect of nano-silica (NS) incorporation with resin infiltrant on water sorption and solubility of resin infiltrant, mineral density of demineralized enamel, and resin tags penetration.
Methods: NS (Sigma-Aldrich, St Louis, Missouri, USA) was added into the resin infiltrant (ICON, DMG, Hamburg, Germany) at two concentrations by weight. The tested groups were: ICON (control), ICON + 0.2, and ICON + 0.5 (n = 10 per group). Water sorption and solubility were assessed using mass variation after 60 days water storage. Mineral density and surface topography were assessed using micro-Computed Tomography scans. Resin tags penetration was measured using a scanning electron microscope. Data were analyzed using one-way Analysis of Variance and Tukey's post-hoc tests (P < .05).
Results: ICON revealed the highest water sorption, solubility mean values (28.90, 7.61) followed by ICON + 0.2 (14.80, 4.82) and ICON + 0.5 (12.32, 0.81) respectively, and vice versa for resin tags penetration. Mineral density of demineralized enamel significantly increased after treatment with ICON + 0.2 and ICON + 0.5.
Conclusion: Incorporation of NS to resin infiltrant decreased its water sorption and solubility along with enhancing the mineral density of the demineralized enamel and the penetration of resin tags.
Competing Interests: Declarations. Ethics approval and consent to participate: All procedures performed in this study, were carried out in accordance with relevant guidelines and regulations of Helsinki Declarations. The collected premolars were extracted for therapeutic reasons unrelated to the study were collected, with prior informed consent from healthy individuals who were seeking dental care at The Oral and Maxillofacial Surgery Department Clinic, Faculty of Dentistry, Mansoura University. The patients were voluntary donating the extracted teeth to The Faculty for utilizing in research purpose. All the experimental protocols were approved by the Dental Research Ethics Committee of the Faculty of Dentistry, Mansoura University with reference number (A0202024CD). Consent for publication: Not applicable. Competing interests: The authors declare no competing interests.
(© 2024. The Author(s).)